From 07687835bea637072221fdcbeb11cf14c43986f7 Mon Sep 17 00:00:00 2001
From: Trevor Saunders <tsaunders@mozilla.com>
Date: Fri, 1 Nov 2013 20:31:32 +0000
Subject: Replace some heap vectors with stack vectors.

From http://gcc.gnu.org/ml/gcc-patches/2013-10/msg02735.html

This patch is pretty dull, it just replaces a bunch of things of the
form
vec<T> x;
x.create (N); // N is a constant
blah blah
x.release ();
by
stack_vec<T, N> x;
blah blah

2013-11-01  Trevor Saunders  <tsaunders@mozilla.com>

gcc/
	* function.c (reorder_blocks): Convert block_stack to a stack_vec.
	* gimplify.c (gimplify_compound_lval): Likewise.
	* graphite-clast-to-gimple.c (gloog): Likewise.
	* graphite-dependences.c (loop_is_parallel_p): Likewise.
	* graphite-scop-detection.c (scopdet_basic_block_info): Likewise.
	(limit_scop); Likewise.
	(build_scops): Likewise.
	(dot_scop): Likewise.
	* graphite-sese-to-poly.c (sese_dom_walker): Likewise.
	(build_scop_drs): Likewise.
	(insert_stmts): Likewise.
	(insert_out_of_ssa_copy): Likewise.
	(remove_phi): Likewise.
	(rewrite_commutative_reductions_out_of_ssa_close_phi): Likewise.
	* hw-doloop.c (discover_loop): Likewise.
	* tree-call-cdce.c (shrink_wrap_one_built_in_call): Likewise.
	* tree-dfa.c (dump_enumerated_decls): Likewise.
	* tree-if-conv.c (if_convertable_loop_p): Likewise.
	* tree-inline.c (tree_function_versioning): Likewise.
	* tree-loop-distribution.c (build_rdg): Likewise.
	(rdg_flag_vertex_and_dependent): Likewise.
	(distribute_loop): Likewise.
	* tree-parloops.c (loop_parallel_p): Likewise.
	(eliminate_local_variables): Likewise.
	(separate_decls_in_region): Likewise.
	* tree-predcom.c (tree_predictive_commoning_loop): Likewise.
	* tree-ssa-phiopt.c (cond_if_else_store_replacement): Likewise.
	* tree-ssa-uncprop.c (uncprop_dom_walker): Likewise.
	* tree-vect-loop.c (vect_analyze_scaler_cycles_1): Likewise.
	* tree-vect-patterns.c (vect_pattern_recog): Likewise.
	* tree-vect-stmts.c (vect_mark_stmts_to_be_vectorized): Likewise.
	(vectorizable_condition): Likewise.

gcc/cp/
	* semantics.c (build_anon_member_initialization): Convert fields to be
        a stack_vec.

From-SVN: r204301
---
 gcc/hw-doloop.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

(limited to 'gcc/hw-doloop.c')

diff --git a/gcc/hw-doloop.c b/gcc/hw-doloop.c
index 9b59f5d..5d26638 100644
--- a/gcc/hw-doloop.c
+++ b/gcc/hw-doloop.c
@@ -237,7 +237,6 @@ discover_loop (hwloop_info loop, basic_block tail_bb, rtx tail_insn, rtx reg)
   bool found_tail;
   unsigned dwork = 0;
   basic_block bb;
-  vec<basic_block> works;
 
   loop->tail = tail_bb;
   loop->loop_end = tail_insn;
@@ -253,7 +252,7 @@ discover_loop (hwloop_info loop, basic_block tail_bb, rtx tail_insn, rtx reg)
   loop->head = BRANCH_EDGE (tail_bb)->dest;
   loop->successor = FALLTHRU_EDGE (tail_bb)->dest;
 
-  works.create (20);
+  stack_vec<basic_block, 20> works;
   works.safe_push (loop->head);
 
   found_tail = false;
@@ -340,8 +339,6 @@ discover_loop (hwloop_info loop, basic_block tail_bb, rtx tail_insn, rtx reg)
 	    }
 	}
     }
-
-  works.release ();
 }
 
 /* Analyze the structure of the loops in the current function.  Use
-- 
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